Lawsuits against New England Compounding Pharmacy Inc. over cases of fungal meningitis linked to the company’s injectable steroids can move forward and evidence must be preserved, a federal judge said. The company had asked U.S. District Judge Dennis Saylor in Boston to delay a dozen lawsuits filed in federal court in Massachusetts pending a decision next year by the Judicial Panel on Multidistrict Litigation on which court should hear the hundreds of cases pending nationwide.